PRINTER, FOOD PRODUCT SCALE AND ASSOCIATED LABEL CASSETTE WITH ADJUSTABLE LABEL STOCK EDGE GUIDE

Abstract

A printer includes a media path along which labels are movable, and a printhead positioned along the media path. At least a part of the media path includes a side structure defining a first side of the part of the media path and a media edge guide for defining a second side of the part of the media path, wherein the media edge guide is movable so as to adjust a spacing between the media edge guide and the side structure for accommodating different media widths. A guide adjustment assembly connected to the media edge guide for providing tool-free manual movement of a position of the media edge guide to adjust the spacing.

Claims

1. A printer, comprising: a media path along which labels are movable; a printhead positioned along the media path; wherein at least a part of the media path includes a side structure defining a first side of the part of the media path and a media edge guide for defining a second side of the part of the media path, wherein the media edge guide is movable so as to adjust a spacing between the media edge guide and the side structure for accommodating different media widths; a guide adjustment assembly connected to the media edge guide for providing tool-free manual movement of a position of the media edge guide to adjust the spacing.

2. The printer of claim 1, wherein the guide adjustment assembly comprises an arrangement that converts a rotation of an adjustment component into a linear movement of the media edge guide.

3. The printer of claim 1, wherein the guide adjustment assembly comprises a rotatable spring, wherein the media edge guide includes an edge guide portion external of the spring and configured for guiding media and a follower portion engaged with the spring to ride along a length of the spring when the spring is rotated so as to cause movement of the edge guide portion along the length of the spring.

4. The printer of claim 3, wherein the guide adjustment assembly further comprises a drive shaft, wherein the spring includes a first end connected to the drive shaft for rotation therewith.

5. The printer of claim 4, wherein the guide adjustment assembly further comprises a gear train including a thumbwheel gear positioned and configured to permit manual rotation and a shaft drive gear, wherein the drive shaft is connected to the shaft drive gear for rotation therewith, wherein the gear train is configured such that rotation of the thumbwheel gear causes rotation of the shaft drive gear.

6. The printer of claim 5, wherein a toothing of the thumbwheel gear is engaged directly with a toothing of the drive shaft gear.

7. The printer of claim 4, wherein the spring includes a second end rotatable about an elongate component.

8. The printer of claim 3, wherein the follower portion comprises a segment passing through a helically running gap of the spring to an elongate portion within a cylindrical passage through the spring.

9. The printer of claim 1, wherein the guide adjustment assembly comprises a rotatable component defining a helical drive path, wherein the media edge guide includes an edge guide portion configured for guiding media and a follower portion engaged with the helical drive path to ride therealong during rotation of the rotatable component forcing the edge guide portion to move along a length of the rotatable component.

10. The printer of claim 9, wherein the guide adjustment assembly further comprises thumbwheel that is rotatable and operatively connected to the rotatable component such that rotation of the thumbwheel causes rotation of the rotatable component.

11. The printer of claim 10, wherein thumbwheel includes an axis of rotation offset from a rotation axis of the rotatable component, wherein the thumbwheel is operatively connected to the rotatable component by a further wheel that includes a rotation axis that is aligned with the rotation axis of the rotatable component.

12. The printer of claim 1, wherein the guide adjustment assembly is configured to prevent inadvertent movement of the media edge guide.

13. The printer of claim 1, wherein the printer comprises a body with a removable media cassette, wherein the side structure, the media edge guide and the guide adjustment assembly are formed on the media cassette.

14. The printer of claim 1, wherein the printer takes the form of a scale that also includes a weigh station for receiving items to be weighed and a load cell for outputting a weight indicative signal.

15. A printer, comprising: a printer body; a media cassette removable from the printer body, the media cassette comprising: a media path along which labels are movable; wherein at least a part of the media path includes a side structure defining a first side of the part of the media path and a media edge guide for defining a second side of the part of the media path, wherein the media edge guide is movable so as to adjust a spacing between the media edge guide and the side structure for accommodating different media widths; a guide adjustment assembly connected to the media edge guide for providing tool-free manual movement of a position of the media edge guide to adjust the spacing, wherein the guide adjustment assembly comprises a rotatable spring.

16. The printer of claim 15, wherein the media edge guide includes an edge guide portion external of the spring and configured for guiding media and a follower portion engaged with the spring to ride along a length of the spring when the spring is rotated so as to cause movement of the edge guide portion along the length of the spring.

17. The printer of claim 16, wherein the guide adjustment assembly further comprises a drive shaft, wherein the spring includes a first end connected to the drive shaft for rotation therewith, wherein the guide adjustment assembly further comprises a gear train including a thumbwheel gear positioned and configured to permit manual rotation and a shaft drive gear, wherein the drive shaft is connected to the shaft drive gear for rotation therewith, wherein the gear train is configured such that rotation of the thumbwheel gear causes rotation of the drive shaft gear.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0009] FIGS. 1 and 2 show perspective views of a scale;

[0010] FIG. 3 shows a perspective view with label cassette removed;

[0011] FIG. 4 shows a partial perspective of a printhead region within the cassette receiving station;

[0012] FIG. 5 shows a side elevation looking outward along the label cassette and showing an exemplary label stock path;

[0013] FIGS. 6-8 show perspective views of a label stock cassette or portions thereof;

[0014] FIGS. 9A and 9B show the label stock edge guide in its two extreme positions;

[0015] FIG. 10 shows a cross-section of a label stock guide region of the cassette; and

[0016] FIGS. 11 and 12 show enlarged portions of the cross-section of FIG. 10.

DETAILED DESCRIPTION

[0017] Referring to FIGS. 1-12, an exemplary scale configuration is shown. The scale 10 includes a weighing station 12, which in some embodiments may be formed by a weighing platter 14 that can be removed (e.g., for cleaning) from atop the scale body 16. A platter support bracket (not shown) transfers forces to a mechanism, such as a load cell 15 located internal of the scale body 16, for producing weight indicative signals when items are placed on the weighing station. An operator interface side 20 of the scale includes an operator interface 22 configured to display information associated with scale operations. By way of example, the operator interface 22 may be formed by a touch-screen display 22a. A customer interface side 24 of the scale includes a customer interface 26, which in certain embodiments may be formed by any suitable display screen technology.

[0018] A side portion of the scale body incudes a cassette station 28 that receives a removable label stock cassette 30 that defines a label exit slot 32. A label printer (e.g., a printhead 34 and associated print roller 35) is located within the scale body and may use any suitable printing technology for printing on labels of a label supply roll 37 loaded in the cassette 30, which printed labels then exit the label exit slot 32 to be applied to products. FIG. 5 shows, along a view looking inward into the cassette station, a label stock path 36 for label stock that includes a liner that is taken up on a take-up reel 38, but linerless label stock could also be used. By way of example, the printhead 34 may be a thermal printhead for printing on thermal label stock.

[0019] Part of the label stock path 36 includes a side structure 40 defining one side of the part of the label stock path and a label stock edge guide 42 for defining an opposite side of the part of the label stock path. The label stock edge guide 42 is movable, per arrow 44, so as to adjust a spacing between the label stock edge guide 42 and the side structure 40 for accommodating different label stock widths. Typically, the label stock edge guide 42 is located in a region of the label stock path that is proximate the printhead, so as to help assure proper label stock position relative to the printhead during printing. Here, the label stock guide 42 moves along a platform structure 46 that defines multiple side-by-side ribs 46a over which the label stock moves. A guide adjustment assembly 50 is connected to the label stock edge guide 42 for providing tool-free manual movement of the position of the label stock edge guide to adjust the spacing between the label stock edge guide 42 and the side structure 40. Here, the side structure 40 is defined by a side surface portion of the housing 30a of the cassette 30.

[0020] In the illustrated embodiment, the guide adjustment assembly comprises a rotatable spring 52 which, here is positioned within a cylindrical passage 46b of the platform structure 46. The label stock edge guide 42 includes an edge guide portion 42a external of the spring 52 and configured for guiding label stock and a follower portion 42b engaged with the spring 52 to ride along a length of the spring when the spring is rotated, thereby causing similar movement of the edge guide portion 42a along the length of the spring 52. Here, the follower portion 42b is formed as a segment passing through a helically running gap 52a of the spring to an elongate portion 42c within a cylindrical passage 52b through the spring 52. The elongate portion 42c provides added stability both during movement and when the label stock edge guide 42 is stationary, and also supports the spring 52.

[0021] In the illustrated guide adjustment assembly a rotatable component, here the spring 52, defines a helical drive path, here the gap 52a. However, alternative structures to define the helical drive path are possible, such as a shaft with a helical groove therealong.

[0022] The guide adjustment assembly 50 includes a drive shaft 54, which is aligned with the spring, and the spring includes an end 52c connected to the drive shaft 54 for rotation with the drive shaft 54. The spring includes an opposite end 52d that is freely rotatable about the elongate portion 42c.

[0023] The guide adjustment assembly 50 further includes a gear train 60 including a thumbwheel gear 60a positioned and configured to permit manual rotation (by a users thumb) and a shaft drive gear 60b. The drive shaft 54 is connected (e.g., keyed) to the shaft drive gear 60b for rotation therewith. The gear train 60 is configured such that rotation of the thumbwheel gear 60a causes rotation of the shaft drive gear 60b, and thus rotation of the drive shaft 54 and spring 52. Here, a toothing of the thumbwheel gear 60a is engaged directly with a toothing of the drive shaft gear 60b, but arrangements with intermediate gears, or with a belt-type interconnection could be provided between a thumbwheel pully and a shaft drive pulley. In all such arrangements, the guide adjustment assembly is configured as an arrangement that converts a rotation of an adjustment component (e.g., the thumbwheel gear or pulley) into a linear movement of the label stock edge guide.

[0024] Here, the thumbwheel gear 60a (or other thumbwheel structure) includes an axis of rotation 60al that is offset from a rotation axis 52e of the spring (or other rotatable component), and the shaft drive gear 60b includes a rotation axis 60b1 that is aligned with the rotation axis 52e.

[0025] The guide adjustment assembly 50 is configured to prevent inadvertent movement of the label stock edge guide 42. In this regard, the force required to rotate the spring 52 may be established to prevent any such inadvertent rotation being caused by vibration or forces of the label stock against the edge guide.

[0026] In the illustrated embodiment, the side structure 40, the label stock edge guide 42 and the guide adjustment assembly 50 are formed on the label stock cassette 30. However, in some embodiments, the arrangement could be provided on a scale or other printer that does not utilize a cassette. Additionally, the arrangement could be employed in connection with medias other than label stock.

[0027] The guide adjustment system is relatively simple and cost-effective, while provide ease of operation by an end user, without requiring the use of tools.

[0028] It is to be clearly understood that the above description is intended by way of illustration and example only, is not intended to be taken by way of limitation, and that other changes and modifications are possible.